91111112101 has 4 divisors (see below), whose sum is σ = 91293700000. Its totient is φ = 90928524204.

The previous prime is 91111112089. The next prime is 91111112107. The reversal of 91111112101 is 10121111119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91111112101 - 2⁵ = 91111112069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91111112107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91293201 + ... + 91294198.

It is an arithmetic number, because the mean of its divisors is an integer number (22823425000).

Almost surely, 2^91111112101 is an apocalyptic number.

It is an amenable number.

91111112101 is a deficient number, since it is larger than the sum of its proper divisors (182587899).

91111112101 is a wasteful number, since it uses less digits than its factorization.

91111112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182587898.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 91111112101 in words is "ninety-one billion, one hundred eleven million, one hundred twelve thousand, one hundred one".